Similar problem but with a CRS312-4C-8XG and an RB4011iGS+ Link comes up at 10G with no issue every time, but most of the time will pass absolutely no traffic. If I mess with the auto-negotiation settings at each end for long enough sometimes the link will come up and remain perfectly stable, until ...

Same Problem as OP I think. Not using any fancy routing. Only doing basic Firewall/NAT/Mangle and DHCP Server and Client. Some static routes, etc. Nothing else. RouterOS Long Term 6.44.3 would cause RB4011 to randomly lock up. First few times a reboot did the trick, uptimes averaged about 60 days be...

Is there any official guidance on this? I have an RB4011 non-wifi that locked up the first time after 75 days uptime, then again after another 90ish days but the second time it did not recover on a cold reboot. I am going to attempt to netinstall it back to life. It would be nice to know if there ar...